Siemens Cerberus CS1140 Commissioning page 63

Fire & Security Products
Siemens Building Technologies Group
Special cases
Normally, each device occupies one D-Bus address. There are a few exceptions, such as
the DC1135 and DC1136 in the AnalogPLUS system, where more than one D-Bus ad-
dress are required.
T-branch module DC1135
The T-branch module can be operated in two different ways.
DC1135 with one stub line
(zero ohm resistance on the circuit unit removed)
A single T-branch module occupies two D-Bus addresses on its own, and each device on
the stub line occupies another address. The first address is required for the beginning of
the stub line (DC1135s). The first detector on the stub line occupies the second address,
the second detector occupies the third address, etc.
At the end of the stub line, after the last detector, another address is required (T-T END).
ü
The two nodes for the beginning (DC1135s) and end (T-T END) of the stub line have
no counterparts in the logical structure and thus remain unlinked.
Example: DC1135 with one stub line
Addr. 1
E3M110/111
DC1135
2 3
(DC1135s) (T-T END)
Stub
4
5
6
7 8 9
Beginning
End
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